Process for making concrete blocks.



T. CORNUELLE.

PROCESS FOR MAKING CONCRETE BLOCKS. APPLICATION FILED-SEPT. 8. I915.

@33m4wu Patented July 17, 1917.

2 SHEETSSHEET T. CORNUELLE. PROCESS FOR MAKING CONCRETE BLOCKS.

APPLICATION FILED SEPT- B. 191?.

Patented.- J uly 17, 1917.

2 SHEETS-SHEET 2- PROCESS FOR MAKING CONCRETE BLOCKS.

Specification of Letters Patent. v

Patented July 17, 191?.

Application filed September 8, 1915. Serial No. 49,609.

To all whom it may concern.

- Be 1t known that I, THEODORE CoRNonLLn,

'-a citizen of the United States, residing at Cincinnati, in the countyof Hamilton and State of Ohio, have invented certain new and usefulProcesses for Making Concrete Blocks, of which the following is aspecification.

My invention relates to the process of making concrete building blocksto imitate solid rock.

Concrete blocks as is well known, are

made by various methods, the most common being to face the block afterit has been cast or molded. This facing of the block often addsgreatlyto the cost of the construction by increasing the time and laborthereon, but requires considerable skill to do properly and to produce acorrect and accurate re semblance of stone.

'It is the object of this inventi'onto pro-' vide aprocess for makingconcrete blocks which will, it is believed, produce blocks with a faceas near in appearance and as perfect a resemblance to stone as it ispossible to produce, no two being alike.

The process consists in casting the blocks. in pairs, preferably, or ina series, and providing a series of wedges which are placed between theblocks, that is, at their point of connection at the time of molding,and then by means of these wedges, fracturing the castings intoindividual blocks, thereby producing blocks, the faces of which areproduced by fracture. dent produces a block with a face the exactappearance of a fractured stone face.

My invention further consists of the method described including thevarious steps in the process as will be hereinafter set forth andpointed out in the appended claims.

In the accompanying drawings which serve to illustrate my invention andwhich show a preferred form Figure 1 isa perspective view of the moldused in my improved process for making concrete blocks.

Fig. 2 is a vertical cross sectional View of same.

Fig. 3 is a perspective view of the frame used in the mold.

Fig. 4 is a modification showing wedge plates which may be used in placeof the frame shown in Fig. 3.

Fig. 5 shows a perspective cross section of a block as it comes from themold.

This it will be evi- Fig. 6 is a side elevation of a block after it hasbeen fractured showing the pitching tool inplace readyto pitch finishthe edge of the block.

Fig. v7 is a perspective view of the completed block.

Referring more particularly to the drawings, 1 represents the floor orbottom of the mold in which the blocks are cast. The side boards .2 areplaced parallel with one another, and the dividing strips 3 are insertedin slots 4L in the side strips, the tongues 3 extending into said slots.Frames 5 are then placed on top of this construction upon which wedges 6are laid. These wedges extend outwardly a short distance and inwardly,or toward each other a short dis tance beyond the inner edges of theplates. Another frame 5 is then placed on top of the wedges 6 upon whichanother set of boards or sides 2 and strips 3 are placed' Then concreteconstituting a finishing ma terial is poured in to a point about threeinches above the plates. This finishing material may be of any color,and consistency to represent any kind of stone desired, fine or coarsegrained, then the rest of the mold is filled up with the concrete firstused. This provides about six inches of fine concrete through which thefracture takes place, and thereby produces a face showing material ofthe consistency desired.

The frames 5 are constructed preferably of steel, having a thick edgeportion 8, and a thinner extension 9 extending toward the center. Theframe is open at the center as shown in Fig. 3.

The frames 5 may be constructed without the thick edges if desired asshown in Fig. 3. l/Vhen the frames 5 are used a shoulder 10 is molded onthe block as shown in Figs. 5 and 6. This shoulder is then pitched offafter the stone has been divided by fracturing approximately along thedotted lines shown in Fig. 5. The pitching is done by means of apitching tool such as is shown in Fig. 6. This operation finishes theface of the stone and adds to its appearance.

lVhen the frames 5 are used without the thick edges as shown in Fig. 4,the blocks are cast without the shoulders 10. Then after the blocks arefractured or broken in half, the edges are chipped or pitched off bymeans of the pitching tool which puts a finish on the block and doesaway with the small flat margin 20 so commonly found in manufacturedblocks. The pitching of the edges also serves to rid the block of anytrace of the Wedges and therefore'this'step 'in'the' process is termedthe finishing... The. frames or plates as shown in Fig. 4' are wedgedshapedinthemselvesand therefore, it is not.

necessary toprovide" the' eXtra Wedge between the plates, butbytappinguthe plates are placed one upon the other, the bars EZl areinsertedf' th-rouglr= suitable loops on the sides ofsaidboardsf-inlorder to hold thenrirr position.

After: the blocks have been fractured the Wedges-fall out' ofplace or:can be easily re moved. The: pitching is tlfen done by means & of thepitching tool whiclrbreaks-.the 'slroul I de'r approximately along thedott'ed lines' thereon in :Fig? 69 v 7 What I claim r as IIeW and idesire to secure by Letters Patent is 1. The process of: makingconcretebuild in g blocks;- consisting of casting them togetheri' With IWedges extending a'* short dista'n'ee therein at their points ofconnection; and then' dividing the -bl-ook's by tapping on the Wedges,thereby fracturing the blocks, the fractured surfaces constituting thefaces 5 of"the' blocks:

2. The process of making concrete building blocks, consisting of castingthem together With wedges at their point of connection, then dividingthem by tapping-the 40 Wedges-and causing a fracture of the block, thenpitching off the shoulders left at the edges of the fracturedfaceshbyvthennolds:

3 The -processrof. making: concrete building blocks, COIISlStlIIg''OfYCaStlflg13116111 in x a mold together, with We'dges inserted 1around i the edgesat2tlieirpoihtbfconnection, thendividing the blocks"before they are ther oughly dryi "by; tapping: on kthe' Wedges, th'crebyfracturing them, and then pitchingvthewo edges :of the fractured rfacesof ith'e blochs to produce a finish.

The process of making c0nc1'ete':-build-' ing'blocks, consisting inbuilding up a'unol-d imWh-iclva-nuunber ofiblocks may" becastfltogetherrwitlv Wedges:- extending? an short distance inrtlfexsides at thei-r point of connec tion and: thenu fillings? the molds withwetr concrete with: a1 suitable quantity of: fine cement connectings'theb'leck's togetherg then allowing: them ltO dry-a'lshort time, thenrdismantling the molds, then tap'pingithe'wedges lightly,.dividingrtheblocks by? fracture and their pitchingraround the edges-ofthe fractured lfacesof the ub lo'ck'ss.

T HEQDOHEGORNUELLEJ (Yopressot thtsmatentmay be obtalned fforsfive eentseach, by addressing; thew(tommlsemnemomlatenm Washington; no?!

